Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- The following conditions may cause an intermittent malfunction:
- There is an intermittent short to voltage in the front fog lamp switch signal circuit.
- The front fog lamp switch is internally shorted to battery positive voltage or is sticking.
- The front fog lamp switch is pressed for longer than 60 seconds.
- If the front fog lamp switch signal circuit is shorted to battery positive voltage, the front fog lamps will remain ON or OFF at all times depending on whether the lamps were ON or OFF when the short occurred. If the short occurred when the lamps were ON, the lamps will remain OFF at all times. If the short occurred when the lamps were OFF, the lamps will remain ON at all times. The BCM will remember whether the lamps were ON or OFF even if the ignition is switched OFF.
- If the DTC is a history DTC, the problem may be intermittent. Perform the tests shown while moving related wiring and connectors. This can often cause the malfunction to occur. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.